PPS barrels are really nice from what i've heard if you don't mind paying that much for a one piece barrel. Don't get a 16" barrel though, they are useless and are more of a hinder then doing any good.

Interesting, so no 16in then. Well I really just don't want to have to deal with paintbreaks etc. Thats what I like about the SP1 is that low force bolt alongside a good barrel thats not breaking anything. I'm not sure if a barrel kit/inserts are the way to go or a good brass palmer...or I guess something cheaper. Someone suggested a Winforce barrel. Maybe a J&J would be fine...I just don't want to deal with breaks all the time as the fields make you use their own paint but sometimes its just trash.